Cutter grinder



Jan. 17,1928.

' '1,656,244 J. `P.` slNGlsER CUTTER GRINDER' Filed March 2, 1923 6 Sheets-Sheet 1 Jan. 17,192.8.

l J. P. SINGISER GUTTER GRINDER Filed llarch 2, 1923 6 Sheetvs-Sheet 2 In are?? aor.'

Jain i? amyzyef Jan. 17, 1928.

P. SINGlsE-R CUTTER @BINDER Filed March 2, 1925 f 6 Sheets-Shui 5 Jn. 11, ma 1,656,244

J.. SINGISIER 4 CUTTER @KINDER Muggia/ Jan. 17, 1928.v

In yen are Jain /P/smyw Patented Jan. 17, 19284.

UNITED STATES PArElvr oFFie-E,

ironia I. sINGIsnR, 0F CHICAGO; ILLINOIS, AssIeNon or ONE-HALF To MAX E. LEH- MANN, or CHICAGO, ILLINOIS, y i

onfr'nn G-RINDER.

applicati@ flied Marcil. 2, i923. srarno. essere;

This invention relates to abrading or grinding machines and has reference more particularly to machines for grinding the blades oi cutting tools such as the blades on milling cutters, or cutting heads for milling machines and the like,` Y

One ot the objects of theiiivention is the provision of means for grinding the blades on milling cutters or heads without removing the blades, from the cutter. Another objectof the invention is the provision oi suitable guiding means `tor the grinding element whereby blades having straight, angiry lar, curved, or other types oteutting edges,

'` and arranged en cylindrical., or non-cylindrical, heads may be elliciently, expeditiously and uniformlyground without removing the blades from the heads. Another object is the provision of means for adjusting the cutter head and the grinding element relatively to each other so that the blades et any type of cutter may be properly ground whether they be arranged on the periphery or side face of` the cutter head, and'that, withoutremoving the bladesfrom the head. A still further object ot the invention is the provision ot' means for manipulating or controlling the grinding operation withaecuracy and ease tdgethei.' withineans whereby the cutter head may be easily and readily secured to, or removed from, `its support,

Other and` further objects and advantages of the invention will appear as the description proceeds.

Fig. 1 is a side elevation of the device;

Fig. 2 is a section on the line 2 2` of Fig. l, looking in the direction of the arrow;

Fig. 3 is a detailed view showing the grinder and guiding arm ;A

V Fig. 4L a sect-ion on line 11j-l of Fig. 1, looking in the direction of the arrow;

Figa 5 is a section on the line 5 5 Fig. 1;

Fig. G is a side elevation of the tool` supporting head, with parts broken away and parts in section Fig. 7 is a plan view ol' the same; l

Fig. 8 is a plan `view of the device with parts broken" away; y h j Fig. 9 is a seet'on on line9-9 ot' Fig. 8;

Fig. 10 is a section on line lil-10' of Fig. 8;

Fig. 11 is a detailed sectional view ot the guiding meinbe g Fig. 12 isa side elevation ot" Fig. 8, with parts broken away;

Fig. 13 a side elevation of the supporting head, showing the guiding carnadj usted for grinding the blades of a conical milling cutter head; A Y

Fig. 14 is a modiliedform of vguiding cani, and j Fig. 15 is a perspective view of the cam supporting plate shown in 12.

On the drawing the referencenurneral 1.0 designates a base, or support,forthe grindmechanism. This base, or support, may be of any suitable or well known construction. That shown is inthe form of a easing and comprises the front wall 11, :rear wall 12,l the end walls 13 and 14 and the top wall 15. The front wall 11 may, if desired, be provided with a door 1G hingedgto the saine in the usual manner. rlfhe base` is adapted to contain a motor 17, provided with an `armature shaft 16 on which is mounted the pulley 19;

Suitable means are provided for holding the tool to be ground; This means is? so ar# ranged that the tool mounted thereon 'may be adjusted to properly present the edge ot' the tool. that is to be ground to the grinding element. This means is also so constructed that itmay be moved from beneath ,thel grinding element in order that the tool inay be readily attached to or removed from the same. `As shown, this supporting means consists of a sleeve 2() provided with a flangek 21 intermediate the eIrClS thereof whereby the` sleeve maybe securechin an opening 22 in the top cover 15 of the easing 10. Slidably and rotatably `mounted within the sleeve a standard 2&5 towhich the tool supporting headl 24 .is adapted to be secured by any suitable means. .The starulA ard 23` may be .verticallyadjusted by the screw 20D which rotated by the hand wheel 20'. The standard may be clamped `les) in adjusted position bythe bolt 20""V engaging the ears 2()d of the split portion of the sleeve.

'A bracket 25 is `zulapted tohbe clamped to the upper end of the standard 23,`as by means of the bolt 26. The bracket 25 is proi vided with laterally extendingfperforated ears 27 and 28 between wliiclrtlie tool sup? portinghead 2a is adapted to be pivoted, as by means of the shaft 29; rThe tool sul porting spindle 30 is journaled in the head 24 in any suitable manner. As shown, ball bearings 3l are provided which are retained in a suitable opening in the head 24 by means ot the nut 32, a suitable retaining member 33 secured to the inner end oit the spindle 36 to prevent withdrawal ot the same.

Suitable means are provided for adjusting the head 24 about the pivot 29. Any suitable mechanism may be employed for this purpose. That shown comprises a worm gear 35 which is rigidly secured in any suitable manner to the pivot 29 and caused to move with said head by means of the bolt 3E which extends through said wheel and through a spaced sleeve 36 and is tapped into said head 24, as indicated in Fig. 7.

The worm gear is operated by means olZ the worm 37 which is .integral with the shaft 3S and suitably journaled in the casing 39 which, in turn, is rigidly secured to the bracket 25, as by means ot the bolts 4,9. The outer end ot the sha'tt 3S may be squared, as

" at 4l, for the reception of a suitable wrench t'or operating the same. The casing 39 may be in two parts, as indicated in Fig. 7, and is adapted to protect t-he periphery of the worm gear 35. The side tace of the worm gear 35 may be graduated, as shown at 34,

for the purpose of indicating the angular adjustment of the head 24. The spindle 239 is adapted to receive the tool to be ground, such as the milling cutter' head 42 in which is secured the tools, or blades, 49. llihen the milling cutter head is placed on the spindle 39 it may be clamped against the shoulder 44 by any suitable means, such the nut 45.

Suitable means are provided 'tor adjustably supporting guiding cams. As shown, the head 24 is provided with a laterally eX- tending arm 46 terminating in elongated rectangular extension 47 and a central screwthreaded stud 48. A cam supporting plate 49 provided with a rectangular groove 50, as indicated at dotted lines in Fig. l2 (see Fi 15), is adapted to be mounted on the outer end of the arm 46 with the rectangular member 47 engaging said groove to prevent turning of said plate. A nut 5'1 on the outer end ot' the stud 48 prevents the removal ol said plate. The plate 49 may be adjusted along the member 47 and held inl adjusted position by any suitable means, such as the set screws 52 and 53 engaging a gib 54 which, in turn, engages the rectangular member 47. One end ot' the plate 49 is adapted to be provided with a vertically arranged guiding groove 55, shown in dotted lines in Figs. l2 and 18, vand clearly shown in Fig. l5.

A guiding 01 master cam 56 is provided with a slotted shank 57 which is adapted to engage the groove 55 and is retained by a bet" The guiding .or master cam 56 is adapted to be held in adjusted position by means of a set screw 59 in the usual manner. The other end of the plate 50 is provided with an extension 69 to which is adapted to be pivotally secured another' master or guiding cam 6l. The master cam 6l is provided with an extension 62 in which is arranged the slot 63. The master cam 6l is lsecured to the extension by means ot the bolt 64, which extends through the tniening 65 in the extension 60 and through the circular open ing in the graduated plate 66, as clearly shown in Fig. 10 ot' the drawings. The graduated'plate 66 is provided with an angular hub 67, which is adapted to engage in the slot 63 to prevent turning of said plate relatively to the master cam 61. The plate 66 may be graduated, if desired, in order to indicate the angle at which themaster cam 6l may be adjusted. The outer end of the bolt 65 is screw threaded and provided with a nut 68. In order to maintain the parts under more o'r less friction during the adjusting oil the master cam, the extension may be provided with a counter bore 69 in which a spring may be placed for engagement between the nut 68 and the extension 60.

In the construction of grinding machines it is necessary to provide means for moving either the tool to be ground or the grinding element, in order that the grinding tool may be properly moved along the vedge oit the tool that is being ground. In the embodiment disclosed, means are provided whereby the grinding element may be moved along the cutting edge of the blade or tool. i

Asshown the tool supporting member 7() pivotally mounted on the base, or casing 10. Any suitable means may be providef` lor this purpose. As shown, the upper wat or top plate 15 o'if the casing 1() is provide( with an openinfr 7l over which a plate 72 is adapted to slide. The wall l5 is provided with elongated slots 73 through which extend bolts 74 which are secured to the plates 72 above the top plate or wall l5 and to the frame members 76, beneath said plate. or top wail l5. Plate 72 is moved either to t-he right or to the lett by means oit a hand wheel 77, which provided with a threaded shalt which engages threaded nuts carried by the traine member 99 rigidlv secured to the plate 72. The supporting member is pivoted to the plate 72. as 78. The plate 72 may be provided with contact points 79 and 80, against which set screws Sl and 82 are adapted to engage. The set screws 8l and 82 are adiustably cm'ed in the ears 83 and 84 vfhichuare carried by the supporting member 70. These set screws may be adjusted in order to limit the oscillator;T movement ot' the supporting member (0. The plate 72 may, ifdesiredi` be provided with the metallic shields 85 and 86, to prevent the entrance of dirt and other l l l l It) dii foreign matter into the casing 1.0 through the opening 471. hollow arm 87 is adapted to be pivotedto the upper end of the suppoiting member by any suitable 'ine suoli as by means of pivots, or trunnions, SS, 88. The upper end of the supporting member 70 may lbe provided with a dust cap 89 'for closing the saine. The arm 87 may be provided with an arcuate shield 89u which is adapted to cooperate with the dust cap 89to prevent the entry oi" dust and other foreign mattei'` into the suplliorting member 70. The inner end of the arm 87 is provided with an arcuate extension 90, the tree end ot which is provided with bearings 91 for shat't 92, rotatably 4mounted in said ariu. Suitable bearings 93 are provided for said shaft in the outer end of the ariiiST. A suit-able grinding element 9d ie rigidly secured in any suitable manner to the outer end of the shaft 92 and is rotatable therewith. The peripheryof the @i lingelement 9-l is transversely curved in order that the saine may be normal` to the cutting edge ot the tool that ie being ground at any angular position ot the arm `87. Tliearni 87 .is adapted to pivot about the pivots or trunnionI 0S, but it may be held in fixed position bynieans of a pin Which is adapted to engage `an aperture a in the support- 70 and a corresponding aperture 90"J in the extension 90 of the arm 87.

A pulley 95 is rigidly secured to the shatt 92 in euch a position that the center' of said pulley Will been the axis `of the pivots 88. The pulley 95 is operated by means of a belt `96 from the pulley 19, on the armature shaft of the motor 17. Suitable belt guides 9T and 9S are rigidly secured to the arcuate member 90 beneath the pulley 95 in such a position as to turn the belt 90 through an angle ot 90 degrees. The plate 72 is provided ivith a trame member or extension 99 on which is mounted the idler pulleys, or belt guides, 100 and 101. The axis of the guides 98 and 100 are in the same plane and likewise the axis ol' the guides 97 and 101.y By this arrangement it Will be seen that when the supporting member 70 is oseillated the belt flexed 'tlatwise of' the saine.

Suitable means are provided for guiding either the grinder element or the tool that is being ground. As shown, the guiding niember is carried by the arm that supports `the grinding element. The arm 87 is adapted to be rigidly attached to the guidinggf arm, or

member, 10Q, as by means ot the screws 103. The outer end 1010i Vthe guiding arm is provided With Y an aperture 4104 y having the counter bore, as at (Fig. 11). A guiding or cam contacting member 106, is slidably mounted in the counter bore 105 of said arm.` The member 10G may be provided Witli agroove into Which the set screw 107 may engage to prevent rotation ot' this,

member.A The 'lower end of the guide may be provided `with a roller 108 for engaging :the cam face 'or guide .surface'ot the master Cil-111s.

Only one cam is used at a time and its tare is so constructed and adjusted Vthat it is :parallel `with the cutting edge `of the tool that is being ground'. Means are provided tor making the final oi nice adjustment of the grinding element 94 to compenlsate for wear in `the grinding element Vand for" properly adjusting the grinding element to'thecuttingedge ot the blade to be ground. rlhis'means consists ot a steni 109 provided Vwith 'a screw-threaded lower endior engaging the member 106; The stein is turned by the li'aiuille 110 and is liu'iited in 'ite vertical movement by the collar 111. A graduated plate 112 secured to the steni 109 wil indicate the vertical adjustment of the grini'ling element.

Attached to the outer end of the ariii 87 a casing 113 which is adapted to cover the upper portion of the `element 94.

A suitable guiding finger 114 adjustably secured to the arni S7 bv means vot the bolt 1155', ifs irovided for the purpos-:e ot engaging the side of the blade or tool that is being ground in order to determine the proper lateral movement of said blade or tool. i y

In Fig. 111 is `shown a modified forni oit inaeter cani meinl'ier. In this form the cam member 50 (litters from the corresponding cani member 50 in that the `guiding tace thereof is curved, as shown at 120, for the purpose of guiding the grinding member along the cutting edge ot a curved blade.

The` cainmeinber 56 is provided with an y extension 121 provided with the channel 122 which is adapted to engage the rectangular end 47 of the arni 40, the stud 4S extendingthrough the slot 123 at the base of channel 122. Set screws 1211 and a gib 125 are adapted to hold the cani member in adjusted position on the arm 4G in the usual manner.`

In the operation of the device, when it is desired to grind the blades of a milling cutter, iter instance, the standard 23 is rotated until. the head 24 is turned away from the grinding element 911. The head 211 niay then be rotated to cause the spindle 30 to assume a vertical, horizontal or anyl inte-r-` its ilo

il ii;

the cutter blades are to be ground the spindle 30 is turned to vertical position, as shown in Fig. 12. If a milling head having the cutter blades conically arranged is to z be ground, the spindle 30 is arranged to an the vinding element 911.-, after Which, by

turning the handle 110, the guiding arm 102 may be adjusted to vertically adjust the grinding element 94.

rIhe operator stands at the lelt ot the machine, as shown in I11 ig. 1, and, grasping the handle 128, moves the grinding' element back and 'forth while the same is being rotated by the motor 17. With his right hand. he holds the cutter head with the blade against the guiding linger 115, "and turns the cutter head to grind the blades succes sively. The ball bearings for the spindle 30 enables the operator to turn the cutter head with case, even though the same may Weigh many pounds.

It will thus be seen that by the cam engaging roller 10S traveling along the face of the master cam and determining the vertical movement ot the grinding element, and the guiding finger 115 engaging *the blade that. is being ground, a uniformity in the grinding of the blades of the cutter is insured.

It is thought from the foregoing, taken in connection. with the accompanying drawY ings, that the constructimi and oi eration of my device will be apparent to those skilled in the art. Various changes in size, shape, proportion and details of construction may be made Without departing from the spirit and scope of the appended claims.

I claim as my invention:

1. In a. de yice of the class described, a base member, a support pivotally mounted on said base member, an arm pivotally mounted on said support, a tool sharpener carried by lsaid arm, means for operating said sharpenrr, and a guide adjuslably connected to said arm :tor limiting lateral movement ol' the tool to be ground.

2. In a device ot the class described, a member, a supporting plate adjustably mounted on said member, a tool sharpener supportoscillatably mounted on said plate, means for confining the oscillation of said support within adjustable predetermined limits, an arm pivoted to said support, a toolV Sharpener carried by said arm and means for supporting a tool in position to be sharpened by said Sharpener.

In an abrasive machine, a base, a sup: porting member oscillatably mounted on said base, an arm pivoted to said member, a tool sharpener carried by said arm, and means for confining the oscillations ot said member Within predetermined limits, said means comprising lugs, arranged on opposite sides of said member and set screws *adjustably carried by said lugs and adapted to engage said base.

11. In a device ot the class described, a base, a motor associated with said base, an armature shai't for said motor, a pulley on said armature shaft, a support pivoted to said base to move in a plane parallel with said armature shaft, an arm pivoted to said support, a shaft journaled in said arm in the planeet said armature shaft, a pulley onsaid arm, belt engaging said pulleys, and means for causing the twisting ot the intermediate portion ot said belt whereby when said support moves about its pivot, said belt is flexed llatwise. p

5. In a. device ot the class described, a base, a standard member, a head pivotally mounted to said standard member, means on said head for support-ing a tool, an arm carried by said head and contour cams pivotally and slidably mounted on saidl arm.

6. In a device of the class described, a base member, a standard member adjustably mounted on said base member, means for pivotally mounting and supporting a head from one end thereof on said standard member, means for angular-ly adjusting aid head, and a tool support rotatably mounted on said head.

7. In a device of the class described, a Y

base, a standard rotatably mounted on said base, a head, means for pivotally mounting and supporting said head from one ond thereof on said standard, a tool support rotatably mounted on said head, and extending laterally therefrom, contour cams and means for adjustably mounting said contour cams on said arm, A

8. In a tool grinding device, a base, a support oseillatably mounted on said base, an arm pivotally mounted on said support, a shaft journaled in said arm, an abrasive member mounted on said sha'l't, meansI 'for rotating said shalt't, means tor manually oscillating .said support, a tool siuliporting i-:tandard adjusiably mounted on said base,

ahead pivoted thereto, a tool suilniorting,

spindle journaled therein, contour cams, means for adjustably supporting the same on said head, a guiding member carried by said arm, a guide adjustably'mounted on said arm and adapted to engage one ot said cams for guiding the movement of said abrasive mem er.

9. In a. device ot the class' described, a base, a support pivotally mounted on said base, an arm pivotally mounted on said support, a shaft, journals for said shaft carried by said arm,`a grinding element operated by said shaft, means for operating said grinding element, a guiding member carried by said arm, a guide adjusiably mounted on said member, and a guiding finger carried by said arm. Y

10. In a device of tlie'class described, a supporting member, a grinding element carried by said. member, means for operating said element, a head, means for pivotally supporting tlie saine, a tool holding spindle pivotally mounted on said head and adapted io support a tool to be ground, an arm secured to said head, a contour cain adjustably mounied on said arm, a guiding member carried by said supporting member and provided With means for engaging said cam for guiding said grinding element in one plane, and a guiding finger adapted to engage the tool While it is being ground to guide said,

said grinding element along the blades of said head for sharpening the same and means engaging said blades for guiding the travel oi said element along said blades.

JOHN P. SINGISER.V 

